Sim Swap from MTN is a nightmare

I helped my mom to migrate from contract to prepaid over a year ago. The migration was successful and the sim card has been working without any issues. The contract was in my mom's name however I am using the sim card.

I have been trying to do a sim swap since early Jan with no success. I am informed that the sim card is still on contract but when I am transferred telephonically to the contract department, I am told the sim is on prepaid. We had to buy multiple sim cards in the attempt to process this sim swap and to date we have not been successful. My mom and I live in 2 different provinces. We visited MTN Malelane together hoping to get the issue resolved. They logged a ticket for us and told us to follow up telephonically. We have called the customer service line and we are still being sent from pillar to post. We called MTN Malelane and spoke with the manager Vusi, he advised that the issue was resolved on 12/01/2022 however I am still not able to do a sim swap. The sim card is still working as a prepaid sim card. All I want to do is a sim swap as the current sim does not fit on my phone.

Can you please decide if the number is on prepaid on contract so that I can move on with my life?